Differential gearing.



.NO. 874,852. PATENTED DEG. 24, 1907.

- W. LORENZ.-

DIFFERENTIAL GEARI-NG;

APPLICATION FILED JUNE 11.1907.

2 SHEET$SHEET 1.

PATENTED DEC. 24, 1907.

w W. LORENZ.

DIFFERENTIAL GEARING. APPLIGQXTION FILED JUNE 17. 1007.

2 SHEETS-SHBBT z.

/ I I I /& 1%

Empire, have invented a new and Improvedi rn sriirns a red 'WILHELM LORENZ, or KAR LSIiVUHE, GERMANY, assicnon o THE FIRM or DAIMLER? MoToRENeEs L scimr'r, OF UNTERTURKHEIM-STUTTQAR'E, GERMANY. t

' DIFFERENTIA sesame;

To all whom it may cbncem: I

Be it known that if, WI HELM LORENZ, a subject of the Grand Duke of Baden, and resident of 55/61 Kriegstrasse, Karlsrnhe, in the Grand Duchy of Baden, German Differential Gearing, of which the following "is an exact specification.

ential shafts.

J 1 lhis lnvention relates to an improved differential gearing for driving,automobiles and the like automatically operated vehicles. The differentialgearing is of such type that .the differential shafts-are coaxially arranged and inclosed one by the other and the driving shaft is situated on the one side of the gear wheels, the so called planet wheeis, serving for transmitting the movement of the latter to the differential shaft and the differential shafts being situated on the other side of such'wheels.

' It is the oliject of my invention to provide a simple, cheap and efficient construction which may be arranged at will at a conven- YVith this object in view the invention consists in fitting the driving shaft with a cylindrical part receiving the planet wheels and the differential shaft with a second casing facing the cylindrical part and cooperating with it as to form a closed casing. y

In order to make niy invention clear, reference is had to the accompanying draw ings, in which:

Figure 1 represents the improved differed tial gearing in a vertical longitudinal section, Fig. 2 is a cross section on line A--B of Fig. 1, Figs. 3 and 4 represent .a front and side view of a planet-wheel serving for transmitting the motion of the driving shaft to the differ- Figs. 5 and 6 are details in front and side-view respectively.

Referring to the figures a is the driving shaft which is provided with a cylindrical head or .enlar ement (1-. Within said heado several cylindrical recesses are provided, in which projections or pivots a are provided and made in this example integral with the wall a of the casing a.

a is a' central projection of the driving Specification of Letters Patent.

. Application filed June 17. 1907. SerialNo. 379.392.

. wheel.

Patented Dec. 24, 1907.

c arefplan'et-wheelsloosely mounted on the pivots a fwithin said recesses.

f isacasing provided with an internally toothed ring f and made integral withthe hollow shaft 72- forming the one differential shaft. i is the second differential shaft in" closed'hy the hollow shaft fl and provided with atoothcd head g, in the recess 9 of which'the afore mentioned projection a ex tends serving for centering and supporting the shaft i. i

Aswill he seen from the figures the planet- Whcels c mesh on the one hand with the internally toothed ring f and on'the other hand with the central toothed wheel g but not one with the other. Both the parts a and f are facing as to form aeioscd casing surroimding and shutting off entirely the "gear of the mechanism.

The operation of this differential gearing will be obvious from the foregoing statements.

By the rotation of the4shaft a and owin to the fact that the internally toothed riin f engages-with the toothed wheels 0 and the hitter are in engagement with the toothed wheel 7 the hollow shaft fettllti the central shaft i are simultaneously turned round. This simultaneous rotation however is n1aintaincd only if the resistance opposed to the movement of hofhshafts 2' and It is the same. If for instance the resistance on the shaft h is greater, the shaft 71 is allowed to rotate more slowly owing to the fact that the toothed wheels 0 are loosely arranged on the pivots 0?. Having thus fully described the nature of my invention, what I desire to secure by Letters Patent of the i'nitcd States is v1. A differential gearing comprising. a driving shaft provided with a cylindrical part and a central differential shaft carrying a toothed wheel, coaxinlly arranged with the driving shaft. and'a second differential shaft inclosing the central sha f1 and provided with a casiinihaving teeth. and planet wheels carriod by the said cylindrical part and mcshin with said teeth and the sa d central toothed 2. if differential gearing comprising a driving shaft provided with a cylindrical hcadfinadc integral with the driving shaft,

pivots carried in rcccsscs hy the drivin shaft, a central differential shaft provided with teeth, a hollow shat'tloosely mounted on said central shaft and provided with an internelljtoothed ring, p1anetwhee1s10b'se1y 1' n lou n ted on the centrai shaft arid providect csrried by said pivots and meshing with the with an internally toothed ring, planetmtg? the oentralshaft and the-internally" wheels loosely mounted on said pivot's and toot e r111 meshing with the internally toothed ring and 1 .3, A :di ei'entitjl gearihg comprising a the toothed'head of the'central shaft.

"shaft-having a toothed head'(g), 1n which a 1 Witnesses:

- central Pivot-.3. hpllow ishafii'loosely f diiving shaft provided with 'a; .cylindrical I In witn s" =where0f1 have hereunto set m Iiied can'yin pivotsf and a ce'ntial-pivot hand in th :presence'of two witnesses. made integra ,with the-said head-a 'oentral WILHELM LORENZ.

eeess'is providti to serve-as; shearing-tor ROBERT UHLA'ND,

- ERNEST ENTENMANN; 

